While playing through the higher difficulties levels, I find myself dying a whole lot (and therefore spending a whole lot of gold repairing my equipment). On death, it says that 10% durability is lost. Is that 10% of the remaining durability, or 10% of the original durability? If it's the former, I would think it would make sense to wait until my equipment breaks to repair. If it's the latter, I wouldn't think it matters.
Does the formula for calculating the cost of repairs linearly scale with how much durability is lost? If so, that might break such a tie.